Montana Fish Report
Water elevation is dropping
by OR Department of Fish & Wildlife Staff
8-13-2025
Website
Water elevation is dropping from ever-decreasing inflows and evaporation. The main boat ramps are such as Mongold and at Detroit Lake State Park are still in the water, however. Pretty much any technique will catch fish, but it might take some experimenting to find out what is most effective on the day you're out there. For those anglers without a boat, there are recreation areas in both upper arms of the reservoir that allow for easy bank angling.
The reservoir gets stocked with trout during the late spring and summer. It was stocked most recently with about 4,000 trophy-sized hatchery trout. As a reminder, anglers are allowed to keep up to five trout, with an additional five fish kokanee bag limit.
It's always a good idea to check the water levels at the U.S. Army Corps of Engineers website before using the boat ramps. For the latest information on water levels at Detroit Reservoir check with the Army Corps of Engineers' website for more information.